Polar Jet

I've never seen this topic discussed, nor was I able to find anything doing a search, but I had a few questions on what LT headers sound like with the NPP set up and the Mild2Wild controller?

1) Is the tone any deeper?
2) How much louder is it in open mode?
3) Is the cabin quiet in closed mode?

Thanks,
Rob

Thomasmoto

I hope you get a response soon. I would like to know as well. Especially if there were no cats used either.

realcanuk

I have ARH 1 7/8 headers with npp. When closed it is almost like stock. Quiet enough that you won't bother anyone, and that you won't want it closed. With the flaps open it sounds great. Not extremely loud unless you are heavy in the gas but very throaty, just how american muscle should sound.

Sativa

I have LG 1 3/4" Super Pro with no cats, NPP, and M2W.
It sounds much deeper at idle and raspy at WOT with the flaps open.
It is quiet with the flaps closed, although not as quiet as stock of course.
It's a great combo and nice to know you can make it quiet if you have to.

NYC6

This car has a cam but it gives you an idea of how good it sounds.
My cabin(LG Pros, cats, NPP/box) is as quiet as stock 06 exhaust when closed.

RicK T

Here's a stock '08:

http://forums.corvetteforum.com/1562894812-post1.html